#647F84
Closest named color: Battleship Grey (#6B7C85). oklch(57.7% 0.032 210.1), rgb(100, 127, 132).
Aa
Black text reads best on this color (4.91:1).
About this color
#647F84 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.032 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.013 away. Black text reads best on it, at 4.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #647F84 |
| RGB | rgb(100, 127, 132) |
| HSL | hsl(189, 14%, 45%) |
| OKLCH | oklch(57.7% 0.032 210.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #647F84 | 4.27:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #647F84 | 4.91:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #647F84 text on white | 4.27:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #647F84 text on black | 4.91:1 | AA | Lc -32.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B7C3C6
oklch(80.9% 0.014 214.4)
-
Step 400
400
#91A5A9
oklch(70.8% 0.023 211.1)
-
Step 500
500
#768F93
oklch(63.2% 0.029 208.3)
-
Step 600
600 (this color)
#647F84
oklch(57.7% 0.032 210.1)
-
Step 700
700
#4D666A
oklch(49.2% 0.03 208.3)
-
Step 800
800
#405356
oklch(42.7% 0.024 208.2)
-
Step 900
900
#364547
oklch(37.8% 0.02 206.3)
-
Step 950
950
#20282A
oklch(27% 0.012 214.5)
#647F84 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7A7D84 | 0.030 |
| Deuteranopia (no green cones) | #757884 | 0.029 |
| Tritanopia (no blue cones) | #5A8280 | 0.017 |
| Achromatopsia (no color) | #7A7A7A | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647F84
#647F84
oklch(57.7% 0.032 210.1)
- #8C736E
#8C736E
oklch(57.8% 0.033 31.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #647F84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.013
- Grey Blue #647D8E ΔE 0.019
- Steel Grey #6F828A ΔE 0.020
- Slate Gray #708090 ΔE 0.026
- Battleship Gray #6C757D ΔE 0.029
- Medium Grey #7D7F7C ΔE 0.035
- Steel #738595 ΔE 0.036
- Gray #808080 ΔE 0.039
Use #647F84 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.